公路工程控制测量中坐标系统的选择

Selection of Coordinate System in Highway Engineering Control Survey

在我国高速公路工程控制测量过程中,由于受到施工现场地质地貌的影响,单纯的应用全国统一坐标系统进行测量,很难保障测量结果的精准度,往往存在一定的长度变形。本文简要介绍了公路测量中坐标系统的选择方法,以及不同方法对长度变形的影响,根据变形公式,分析国家统一坐标系的适用范围,从而进行坐标系统的选择。并结合湖南省城步至龙胜(湘桂界)高速公路测量成果实例,说明如何选取坐标系统,以解决控制网中长度综合变形影响,满足工程实际需要。

In the process of highway engineering control survey in our country,due to the influence of the geology and geomorphology of the construction site,it is difficult to ensure the accuracy of the measurement results by simply applying the unified national coordinate system for measurement,and there is often a certain length deformation.This article briefly introduces the selection method of the coordinate system in highway survey and the influence of different methods on the length deformation.According to the deformation formula,the applicable scope of the national unified coordinate system is analyzed,so as to select the coordinate system.Combining with the measurement results of the highway from Chengbu to Longsheng(Xiang-Guijie)in Hunan Province,it explains how to select the coordinate system to solve the influence of the comprehensive deformation of the length of the control network and meet the actual needs of the project.